2775421161 has 12 divisors (see below), whose sum is σ = 4084582788. Its totient is φ = 1815369504.

The previous prime is 2775421157. The next prime is 2775421163. The reversal of 2775421161 is 1611245772.

2775421161 is a `hidden beast` number, since 2 + 7 + 75 + 421 + 161 = 666.

2775421161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1419782400 + 1355638761 = 37680^2 + 36819^2 .

It is not a de Polignac number, because 2775421161 - 2² = 2775421157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2775421163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2908770 + ... + 2909723.

It is an arithmetic number, because the mean of its divisors is an integer number (340381899).

Almost surely, 2^2775421161 is an apocalyptic number.

It is an amenable number.

2775421161 is a deficient number, since it is larger than the sum of its proper divisors (1309161627).

2775421161 is a wasteful number, since it uses less digits than its factorization.

2775421161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818552 (or 5818549 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 2775421161 is about 52682.2660959075. The cubic root of 2775421161 is about 1405.3234668503.

The spelling of 2775421161 in words is "two billion, seven hundred seventy-five million, four hundred twenty-one thousand, one hundred sixty-one".